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A common greenish-brown North American frog that has dark leopardlike spots with a pale border.
- ‘Wild-caught, subadult northern leopard frogs were obtained from Kons Scientific Company (Germantown, Wisconsin) and maintained on a diet of laboratory-raised crickets.’
- ‘During annual summer visits to his uncle's house in Vermont, John DeLeo does a lot of frog hunting (mostly leopard frogs and American toads) in a large pool beside the Green River.’
- ‘The Berkeley team now reports similar laboratory results in two U.S. species, the leopard frog and the Pacific tree frog.’
- ‘The 10% increase in mouth width for wood frogs was relatively large and may be the primary cause of faster growth in wood frogs when competing with leopard frogs in the absence of predators.’
- ‘Hayes's lab showed that minute amounts of atrazine, a nearly ubiquitous herbicide, can derail reproduction in natural populations of leopard frogs by causing males to make eggs.’
- ‘On October 9, 1992, 10,000 leopard frogs were killed on the two-mile stretch of four-lane highway.’
- ‘On June 14, we proposed to list the Chiricahua leopard frog as threatened due to the effects of non-native predators, disease, habitat loss, and potential natural events, such as floods and drought.’
- ‘Competition in the absence of caged predators was asymmetric; when reared separately, leopard frogs grew more than wood frogs, but when competing (without predators), wood frogs grew faster than leopard frogs.’
- ‘I observed wood frogs 38 times and leopard frogs 28 times during all daylight hours.’
- ‘Hayes' team has also discovered that leopard frogs, native to the United States, living near atrazine-contaminated ponds in the Midwest show the same abnormalities as the atrazine-exposed animals in his lab.’
- ‘The grassy banks were hosting swarms of young two - to three-inch leopard frogs - typical in wet years of many ponds scattered across south and southeast Texas.’
- ‘On wildlife refuges in Arizona where Schwalbe studies the amphibian, bullfrogs have nearly eliminated the Mexican garter snake and the Chiricahua leopard frog.’
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